From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Radiator and performance test results from Brooklands and requesting further testing.
| Identifier | ExFiles\Box 101\1\ scan0180 | |
| Date | 4th April 1936 | |
| W/LH.{Mr Haworth} - Mr. Hancock. X500a Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/KW.4.4.36. Thank you for your report on Brooklands test on radiators, etc. The temperature difference between the cylinder head and the radiator seems in every case to be too big, and we suggest that as a quick test you could remove the cylinder head, block up a few of the water passages at the front end of the head, and so push more water round the back of the head. This might also reduce detonation. At the same time we are repeating our tests here, taking a pipe direct from the water pump to the rear end of the cylinder head. We are not quite clear from your report on 22-G-V on the track whether the acceleration figures were taken both ways or not. It is obviously quite easy on the track to get figures both with and against the wind, and curves which are not taken in this manner do not mean very much. I suggest you might repeat the figures, doing them on a straight stretch of road when there is not much wind, as we should like to have the records. Will you also let us have the exact weight of the car. Another point is that the half mile figures are given dead against the wind. On Brooklands it should be perfectly easy to get a half mile with and against the wind, and so get a mean figure. Will you please repeat these figures as opportunity occurs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||